问问大佬们一个 docker-compose 水平扩展容器挂载目录的问题

[tqccc]

问题很简单，水平扩容某个 service 后，因为 docker-compose.yml 文件里声明的宿主机挂载目录就一个，比如我挂载出日志文件，扩容 --scale myService=2， 启动以后发现宿主机只有一个 logs，而且里边日志文件内容每行都输出了 2 次，有什么好办法自动区分挂载目录或者文件吗？

这是我的 docker-compose.yml:

version: '3'
services:
  nginx:
    image: nginx:latest
    volumes:
      - /data/nginx/nginx.conf:/etc/nginx/nginx.conf
    depends_on:
      - myService
    ports:
      - "80:80"

  myService:
    build:
      context: ./
    restart: always
    image: tqc/myService
    volumes:
      - /data/myService/logs:/myService/logs
    extra_hosts:
      - "redisHost:192.168.99.1"
      - "mysqlHost:192.168.99.1"

启动命令：

docker-compose -f docker-compose.yml build --no-cache

docker-compose -f docker-compose.yml up -d --scale myService=2

宿主机挂载目录 /data/myService/logs 里头的日志重复现象（输出了两次。。。。）：

......
......
......
......
2020-05-15 15:09:34.399  INFO 10520 --- [           main] d.s.w.p.DocumentationPluginsBootstrapper 163 : Found 1 custom documentation plugin(s)
2020-05-15 15:09:34.399  INFO 10520 --- [           main] d.s.w.p.DocumentationPluginsBootstrapper 163 : Found 1 custom documentation plugin(s)
2020-05-15 15:09:34.471  INFO 10520 --- [           main] s.d.s.w.s.ApiListingReferenceScanner     41 : Scanning for api listing references
2020-05-15 15:09:34.471  INFO 10520 --- [           main] s.d.s.w.s.ApiListingReferenceScanner     41 : Scanning for api listing references
2020-05-15 15:09:34.773  INFO 10520 --- [           main] o.a.coyote.http11.Http11NioProtocol      173 : Starting ProtocolHandler ["http-nio-6060"]
2020-05-15 15:09:34.773  INFO 10520 --- [           main] o.a.coyote.http11.Http11NioProtocol      173 : Starting ProtocolHandler ["http-nio-6060"]
2020-05-15 15:09:34.806  INFO 10520 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  204 : Tomcat started on port(s): 6060 ( http) with context path ''
2020-05-15 15:09:34.806  INFO 10520 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  204 : Tomcat started on port(s): 6060 ( http) with context path ''
.......
.......
.......

[robot1]

想平滑扩展 就上日志收集
可以在启动的时候获取机器名，日志名加上机器名，但你都分布式了不用日志收集，这种分散的日志很难查问题

[tqccc]

@robot1 噢噢懂了，多谢大佬，按照你的提示搜到不少知识，以及发现每个容器的标准输出日志都在
/var/lib/docker/containers/ 里头

[robot1]

@tqccc 互相学习

[tqccc]

elk：

https://github.com/deviantony/docker-elk